If you own a PSP, you might want to uh, make sure your battery isn't expanding – Destructoid
2-Pack High Capacity Replacement Battery for Sony PSP 2000 3000, Playstation Portable Slim PSP-2000 PSP-2001 PSP-3000 PSP-3001 PSP-3002 Rechargeable Lithium 3.6V 1200mAh 2x Batteries by Insten - Walmart.com
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UPGRADE Battery For Sony PSP2000 2006 3000 3006 Battery Psp-S110 Li-Ion 640925559995 | eBay